Question about 1999 Chevrolet Blazer

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My 1999 chevy blazer 4wd just quick working it engages but doesnt work? please help need answer fast

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Check the actuator under the battery. make sure that it's working and pulling on the cable to lock the front hub. If it is and the front wheels are not locking then the clip at the front pumpkin (differential) may be broken or the fork that engages the axle. If everything looks good and the actuator is not working, inspect the vacuum line to the 4wd vacuum switch on top of the transfer case (drivers side) and then work your way to the vacuum line to the engine compartment. There is a T vacuum line by the ABS unit on the drivers side and inspect the lines there and the vacuum canister in the fender. Good luck and keep me posted and hope it's a simple vacuum line that went bad and not the front pumpkin.

Posted on Feb 02, 2010

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